<form action="/orders/" method="post">
    <label><span>学生学号:</span></label>
    <input type="text" name="studentid" style="width: 120px">
    <label><span>预约状态:</span></label>
    <select name="isorder" style="width: 150px">
        <option value="">请选择预约状态</option>
        <option value="0">预约</option>
        <option value="1">取消</option>
    </select>
    <input type="submit" value="查询">
</form>